Package org.eclipse.persistence.internal.jpa.parsing

Class CountNode

java.lang.Object

org.eclipse.persistence.internal.jpa.parsing.Node

org.eclipse.persistence.internal.jpa.parsing.AggregateNode

org.eclipse.persistence.internal.jpa.parsing.CountNode

All Implemented Interfaces:

AliasableNode

public class CountNode
extends AggregateNode

INTERNAL

Purpose: Model a COUNT

Responsibilities:

• Apply itself to a query correctly

Since:

TopLink 5.0

Author:

Jon Driscoll

Field Summary

Fields inherited from class org.eclipse.persistence.internal.jpa.parsing.Node

alias, left, right, shouldGenerateExpression

Constructor Summary

Constructors

Constructor	Description
CountNode()

Method Summary

Modifier and Type	Method	Description
protected Expression	addAggregateExression(Expression expr)	INTERNAL
void	applyToQuery(ObjectLevelReadQuery theQuery, GenerationContext context)	INTERNAL Apply this node to the passed query
String	getAsString()	INTERNAL Get the string representation of this node.
boolean	isCountNode()	INTERNAL Is this node a CountNode
void	validate(ParseTreeContext context)	INTERNAL Validate node and calculate its type.

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.AggregateNode

generateExpression, isAggregateNode, isAliasableNode, resolveAttribute, resolveClass, setDistinct, usesDistinct

Methods inherited from class org.eclipse.persistence.internal.jpa.parsing.Node

addToExpression, appendExpression, getAlias, getColumn, getLeft, getLine, getRight, getType, hasLeft, hasRight, isAttributeNode, isConstructorNode, isDivideNode, isDotNode, isEscape, isLiteralNode, isMapKeyNode, isMinusNode, isMultiplyNode, isNotNode, isParameterNode, isPlusNode, isSubqueryNode, isVariableNode, qualifyAttributeAccess, resolveClass, resolveMapping, resolveMapping, setAlias, setColumn, setLeft, setLine, setRight, setType, toString, toString, toStringDisplayName, toStringIndent, validateParameter

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.persistence.internal.jpa.parsing.AliasableNode

getAlias, setAlias

Constructor Detail

CountNode

public CountNode()

Method Detail

applyToQuery

public void applyToQuery(ObjectLevelReadQuery theQuery,
                         GenerationContext context)

INTERNAL Apply this node to the passed query

Overrides:

applyToQuery in class Node

validate

public void validate(ParseTreeContext context)

INTERNAL Validate node and calculate its type.

Overrides:

validate in class Node

addAggregateExression

protected Expression addAggregateExression(Expression expr)

INTERNAL

Specified by:

addAggregateExression in class AggregateNode

isCountNode

public boolean isCountNode()

INTERNAL Is this node a CountNode

Overrides:

isCountNode in class Node

getAsString

public String getAsString()

INTERNAL Get the string representation of this node.

Overrides:

getAsString in class Node